Does this only need to work on LAN? I’ve not used Kerberos.
I’ve never had SMB break. It’s definitely been my LAN network storage protocol of choice over the years, decent performance and perfect reliability so far.
And while I do have SSHFS set up, and use it sometimes, it’s by far the slowest solution in my experience. I basically only use it to pull a file via phone if I need something off my desktop or home server that I didn’t put in a location accessible via/synced to nextcloud, and I’m not at home to grab it via my desktop (which mounts my server’s fulesystem via SMB).
Some time ago I finally set up off-site backup at my dad’s, and while nextcloud has been my solution for convenient file storage, sharing and access from anywhere, it’s extreme overkill for such a use-case.
It’s better suited for syncing folders (using up space on both client and server), not mounting as a network storage location (though I think it can do that?)
What I ended up doing was setting up unencrypted FTP through the VPN that I use to access my home network. Server at dad’s connects to it on startup, from there my server is able to see the off-site machine on my LAN and it can then dump backups into it.